3GP → MOV

Ya, kuma wannan shi ne hanya mai sauri. 3GP da MOV suna raba irin wannan tsari na akwatin da ke ƙasa, don haka ana kwafe bidiyon da sauti a cikin bayt-by-byte kuma kawai an sake rubuta ƙofar ƙofar. Ba a decode komai ba kuma ba a sake ƙuntata komai ba, don haka fayil mai tsawo na fasali zai ƙare cikin minti daya a maimakon awa daya, tare da ingancin fitarwa na daidai da na asali. 3GP shi ne mai riƙe da 3GPP standardized ga farko wayar hannu, lokacin da bidiyo ya kamata ya dace da 176x144 allon da 2G data plan. MOV ne Apple QuickTime jakar, shige a cikin 1991 kuma har yanzu format na iPhone, iPad ko Final Cut Pro timeline ya rubuta ta default.

Yanzu. 3GP ba ta da wata hanyar amfani da sautin-bayanan-da-ke-da-sauki, don haka an bukaci a rubuta sautin-bayanan ga 3GP cikin hoton ko kuma a aika da shi kamar wata fayil mai sauya. MOV na da sautin-bayanan kamar yadda za'a iya zaɓar su a cikin wani ruwa, don haka bayan canjawa za ka iya haɗa wata hanyar SRT da mai kallo zai iya kunnawa, da kashewa ko kuma sake fasalin.

Yana yi. MOV na adana sashe kamar metadata na kwandon, don haka za'a iya tafiyar da wani rikodin mai tsawo ta ɓangaren ba tare da rufe wani barar ci gaba ba. 3GP ba ta da wurin da za'a saka wannan bayanin ba, don haka idan mai samarwa ya aiko da jerin sashe ya kasance cikin fayil na sidedcar — ba da wannan zuwa mai canja wurin kuma zai rubuta cikin MOV. MOV ne format professional mawallafa tambaya ga, saboda shi ya tsira da sake-run round-jirgi ta hanyar Final Cut Pro, Premiere da DaVinci Resolve ba tare da generational asara.

Na'am — duk waƙoƙin sauti a cikin 3GP (waƙoƙin mai shiryawa, yarukan dabam, waƙoƙin bayani) ana kiyaye su a cikin MOV idan mai nema na goyon bayan waƙoƙin sauti masu yawa. MKV da MOV suna kula da waƙoƙin sauti ba tare da iyaka ba; MP4 yana goyon bayan da yawa amma wasu masu wasa da na'urorin haɗi suna ganin waƙoƙin 1 kawai; WebM ana hana shi a waƙoƙin Opus / Vorbis guda.

Subtitles soft (tracks da ake iya zãɓewa) suna tsira idan MOV zai iya ɗaukar su: MKV yana da SRT, ASS, SSA, PGS, VobSub a matsayin native; MP4 yana da mov_text kawai (farashin da aka rufe). Canja MKV tare da ASS styled subs zuwa MP4 zai iya sa su kasa zuwa mov_text ko kuma a toshe su. Hardsubs (an toshe su cikin bidiyo) suna tsira duk da haka.

Metadata na babi na canja tsakanin 3GP da MOV duk lokacin da bangarorin biyu ke goyon bayan wani atom na babi (MKV, MP4, MOV). WebM na adana babi a cikin wani ɓangaren da ya dace da Matroska, don haka MKV <-> WebM na dauke da babi-zuwa-baya cikin tsabta. AVI ba shi da wani bayani na babi, don haka canja AVI zuwa MOV zai samar da fayil da ba a raba shi ba sai idan ka ƙara alamun shafi da hannu.

MKV shi ne mai sarrafa maɓallin maɓalli kawai wanda ke adana fayilolin da aka haɗa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Zuwa daga 3GP zuwa MOV yana daure waɗannan maɓallan idan MOV bai zama MKV ba — maɓallan elemental na canjawa, amma nauyin da aka haɗa yana zaune a cikin tushen. Ka riƙe 3GP a matsayin madadin idan kana dogara da maɓallan da aka haɗa.

An zaɓi codec ɗin diff don ya haɗu da mai riƙe MOV da kyau: MKV diff zuwa H.265 (HEVC) don mafi kyawun ƙuntata; MP4 diff zuwa H.264 don mafi faɗin goyon baya na na'ura; WebM diff zuwa VP9; AVI yana amfani da MPEG-4 ASP (DivX/Xvid lineage). Yaƙin neman zaɓe ta hanyar jerin kayan aikin codec na ci gaba — AV1 yana da samuwa ga MKV / WebM inda kake so mafi girman ƙuntata kuma zaka iya jira ta hanyar ƙuntata. MOV fayiloli ne girma, kuma a waje na Apple ecosystem playback goyon baya ne patchier fiye da MP4 - da kuma wasu Smart TVs za su ki su.

Metadata na HDR na canzawa (HDR10 masu nuna kimar, matsakaicin matsakaicin matsakaici) yana tafiyar da MOV idan kowace ƙuƙumma da codec ɗin da aka zaɓa suna goyon baya (HEVC, AV1 a cikin MKV / MP4). Dolby Vision yana da tsananin rauni — siffar DV 5 / 7 / 8.1 a cikin 3GP tana da ƙarfi kawai a cikin MKV tare da HEVC; canjawa zuwa ƙuƙumma MOV da ba ta da ɗakin DV yana daidaita zuwa HDR10.

MKV da WebM suna rikodin lokaci-da-firam na gaskiya kuma suna kula da VFR na asali, don haka 3GP VFR yana tsira cikin MOV daga cikin waɗannan sifofin ba tare da sake-samuwa ba. MP4 na adana lokaci-da-samuwa kuma amma wasu masu wasa suna tsammanin CFR; mai maida yana nuna wani "ciwon CFR" toggle wanda ke sake-samuwa VFR 3GP zuwa 24 / 30 / 60 fps MOV ga burin da ke da matsala.

Same-codec remux na samar da girman da ya kusan daidai (cikin kwandon da ke da bambanci na 0.1-2%). Canjin codec na iya juya girman da 50% ko fiye: H.264 zuwa H.265 na iya raba fayil din da rabi da ingancin gani na daidai; H.264 zuwa AV1 na raba shi da rabi a kan wani ƙananan ƙayyadadden. Zuwa daga high-bitrate 3GP (Blu-ray rip) zuwa low-bitrate MOV (web upload) shi ne dalilin da ya fi yawa na daina aiki.